<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/Home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域  slot-scope="scope" -->
            <el-table :data="rolesList" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag @close="removeRightById(scope.row, item1.id)" closable>{{ item1.authName }}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环，嵌套渲染二级权限 -->
                                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success" @close="removeRightById(scope.row, item2.id)" closable>{{ item2.authName }}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag @close="removeRightById(scope.row, item3.id)" closable type="warning" v-for="item3 in item2.children" :key="item3.id">{{ item3.authName }}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRolesById(scope.row.id)">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 添加角色的对话框 -->
        <el-dialog
            title="添加角色" :visible.sync="addDialogVisible"
            width="50%" @close="addDialogClosed">
            <!-- 内容主体区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRoles">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改角色的对话框 -->
        <el-dialog title="修改权限" :visible.sync="dialogVisible" width="50%" @close="editDialogClosed">
            <!-- 内容主体区域 -->
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRolesInfo">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisable" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightsList" :props="treeProps" 
            show-checkbox node-key="id" default-expand-all
            :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="dialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data() {
        return {
            // 所有角色列表数据
            rolesList:[],
            dialogVisible: false,
            editForm: {},
            editFormRules: {
              roleName: [
                { required: true, message: '请输入角色名', trigger: 'blur' },
                { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
              ],
              roleDesc: [
                { required: true, message: '请输入角色描述', trigger: 'blur' },
                { min: 1, message: '描述不能为空', trigger: 'blur' }
              ]
            },
            editDialogVisible: false,
            addDialogVisible: false,
            addForm: {},
            addFormRules: {
              roleName: [
                { required: true, message: '请输入角色名', trigger: 'blur' },
                { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
              ],
              roleDesc: [
                { required: true, message: '请输入角色描述', trigger: 'blur' },
                { min: 1, message: '描述不能为空', trigger: 'blur' }
              ]
            },
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisable: false,
            // 所有权限数据
            rightsList: [],
            // 树形控件的属性绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点数组
            defKeys:[],
            // 当前即将分配权限的角色id
            roleId:''
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        // 获取所有角色的列表
        async getRolesList() {
            const { data: res } = await this.$http.get('roles')
            if(res.meta.status !== 200){
                return this.$message.error('获取角色列表失败')
            }
            this.rolesList = res.data
            console.log(this.rolesList)
        },
        async showEditDialog(id) {
          const { data: res } = await this.$http.get('roles/' + id)
          if(res.meta.status !== 200){
              this.$message.error('查询角色信息失败')
          }
          this.editForm = res.data
          this.dialogVisible = true
      },
         editDialogClosed() {
          this.$refs.editFormRef.resetFields()
      },
        editRolesInfo() {
          this.$refs.validate(async valid => {
              if(!valid) return
              const { data: res } = await this.$http.put('roles/' + this.editForm.id, {
                roleName: this.editForm.roleName,
                roleDesc: this.editForm.roleDesc
              })
              if(res.meta.status !== 200){
                this.$message.error('更新角色信息失败')
              }
              this.dialogVisible = false
              this.getRolesList()
              this.$message.success('更新角色信息成功')
          })
      },
        async removeRolesById(id) {
          const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {


            confirmButtonText: '确定',

            cancelButtonText: '取消',
            type: 'warning'
          }).catch(err => err)
          if(confirmResult !== 'confirm'){


              return this.$message.info('已取消删除')
          }
          const { data: res } = await this.$http.delete('roles/' + id)
          if(res.meta.status !== 200){
            return this.$message.error('删除角色失败')
          }
          this.$message.success('删除角色成功')
          this.getRolesList()
      },
        addDialogClosed() {
          this.$refs.editFormRef.resetFields()
      },
        addRoles() {
        this.$refs.addFormRef.validate(async valid => {
                console.log(valid)
                if(!valid) return
                // 发起添加用户的网络请求
                const { data: res } = await this.$http.post('roles', this.addForm)
                if(res.meta.status !== 201){
                    this.$message.error('添加角色失败')
                }
                this.$message.success('添加角色成功')
                // 隐藏添加的对话框
                this.addDialogVisible = false
                // 重新获取用户列表
                this.getRolesList()
         })
      },
        // 根据ID删除对应的权限   
        async removeRightById(role, rightId) {
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)

            if(confirmResult !== 'confirm'){
                return this.$message.info('取消删除')
            }

            const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status !== 200) {
                return this.$message.error('删除权限失败')
            }
            role.children = res.data
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role) {
            this.roleId = role.id
            // 获取所有权限的数据
            const { data: res } = await this.$http.get('rights/tree')
            this.setRightDialogVisable = true

            if(res.meta.status !== 200) {
                return this.$message.error('获取权限数据失败')
            }
            // 把获取到的权限数据保存到data中
            this.rightsList = res.data
            // 递归获取三级节点的Id
            this.getLeafKeys(role, this.defKeys)
            this.setRightDialogVisable = true
        },
        // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
        getLeafKeys(node, arr) {
            // 如果当前node节点不包含children属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item => 
                this.getLeafKeys(item, arr)
            )
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed() {
            this.defKeys=[]
        },
        // 点击为角色分配权限
        async allotRights() {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            // console.log(idStr)
            const { data: res} = await this.$http.post(`roles/${this.roleId}/rights`,
            {rids: idStr})
            console.log(res)
            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功')
            this.getRolesList()
            this.setRightDialogVisable = false
        }
    }
}
</script>

<style lang="less" scoped>
    .el-tag {
        margin: 7px;
    }

    .bdtop {
        border: 1px solid #eee;
    }

    .bdbottom {
        border: 1px solid #eee;
    }

    .vcenter {
        display: flex;
        align-items: center;
    }
</style>
